Backstreet's back... no, seriously. The boy-turned-man band Backstreet Boys brought a larger than life, sold-out performance to Detroit on Monday night as part of BSB's massive DNA world tour. Kevin, Howie, A.J., Nick, and Brian took to the Little Caesars Arena stage with a hit-packed, 33-song, two-hour set spanning their 25-year long career as heartthrobs.